Theodore guilleaume



(No Model.)

T. GUI'LLBAUME. ELECTRIC CABLE.

No. 514,849. Patented Feb. 13, 1894.

UNITED STATES PATENT OFFICE...

THEODORE GUILLEAUME, OF COLOGNE, GERMANY.

ELECTRIC CABLE.

SPECIFICATION forming part of Letters I atent No. 514,849, datedFebruary 13, 1894.

Application filedMarch 27, 1893. Serial No. 467,905. (No model.)Patented in England April 12, 1892, N0- '7,029l i G rm y April 13, 1892,No. 65,311,- in Italy May 2,1892, LXII, 220; in Austria-Hungary August20, 1892, No. 20,129 and N0- 39,499; in Switzerland August 31, 1892,1To4,859; in Belgium December 31, 1892, No. 102,566; in France March8,1893,

No. 220,891, and in Sweden March 30,1893,No.4,280.

To all whom it may concern.-

Be it known that I, THEODORE GUIL- LEAUME, a subject of the GermanEmperor, residing at Cologne, in the German Empire, have invented newand useful Improvements in Electric Cables, (in respect whereof I haveobtained Letters Patent in the following countries: Great Britain, No.7,029, dated April 12, 1892; Germany, No. 65,311, dated April 13, 1892;France, No. 220,891, dated March 8, 1893; Belgium, No. 102,566, datedDecember 31, 1892; Italy, LXII, 220, dated May 2, 1892; Austria-Hungary,No. 20,129 and N 0. 39,499, dated August 20, 1892; Switzerland, No.4,859, dated August 31, 1892; Sweden,No.1,280, dated March 30, 1893; andRussia, No. 11,845, dated August 25, 1893, not yet granted,) of whichthe following is a specification.

This invention relates to electric cables or conductors for general use,and is based on and consists in developments of the invention thesubject of Letters Patent granted to me and bearing date September 27,1892, No. 483,285, the same being specially adapted for employment intelephonic transmission, while cables constructed according to mypresent invention are particularly suitable for telegraphic purposes.

In the accompanying drawings, which serve to illustrate my improved modeof construction, Figure 1 is a transverse section of a cable constructedaccording to my present invention and having eighteen conductorsdisposed in two concentric groups, separated by means of crimpedcylinders made of non-conducting material of uniform thickness, andinclosed in a lead or other protective sheathing. Fig. 2 represents, inside view and transverse section, the central portion of the cableillustrated by Fig. 1. Such a group may itself be suitably covered andform a cable having six or other convenient number of wires.

In Fig. 2, the conductors a, a, a &c., are separated from one anotherbya crimped cylinder b of suitable non-conducting material, such aspaper. This cylinder is star-shaped in cross-section, and may be madefrom material of uniform thickness. The cylinder presents longitudinalgrooves b 1), b, 650., each of which provides an air-space wherein oneof the naked conductors lies; these grooves becoming spiral on the partsthus associated being twisted about the axis of the said cylinder. Thelatter treatment serves to retain the conductors in position in theirrespective grooves of the crimped cylinder, as also to prevent theformation, or counteract the influence, of induced currents. Or thecable or strand may be formed as illustrated in Fig. 1 where a centralstand, comprising six (or other convenient number of) wires, arranged inthe grooves of a crimped cylinder as previously described, is surroundedby a group of twelve (or other convenient number of) conductors c, 0', 0&c., arranged in the longitudinal grooves d", 61', d &c., of a largercrimped cylinder d or crimped cylinder of insulating material. Theconductors c, c, 0 850., may be twisted with the grooved cylinder d; thedirection of twist being pref erably opposed to that of the centralgroup. The outer covering 6 consists of lead sheathing or otherprotective material. The number of groups may, moreover,be varied; thatis to say, the central series of conductors and grooved insulatingmaterial a-b, and the surrounding series c-d, may be enveloped by athird group resembling the series c-d. The number of conductors ineither or any group may also be varied, and the space in the center ofthe cable may be utilized for the reception of an additional conductor,as shown in Fig. 2.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. For use in an electric cable, a crimped cylinder, such as b or cl,made of non-conducting material and having spiral grooves or airchannelsin which naked conductors may lie, substantially as herein described.

2. In an electric cable or strand forthe same, the combination, withnaked conductors, of a crimped cylinder star-shaped in cross section,made of non -conducting material crimped and twisted to form spiralgrooves or airspaces, and having the several conductors lying in therespective grooves, substantially as herein described.

3. In an electric cable, the combination, with a series of nakedconductors a, c, 0. &c.,

ing material I), in combination with a concentrically-arranged series ofnaked conductors c, c, 0 &c., lying in the air-spaces of aspirally-grooved crimped cylinder of non-com ducting material 01, andwith a lead or equivalent protective sheathing e, substantially asherein set forth.

THEODORE GUILLEAUME. Witnesses:

RICH. SOHULDER, HUGO HAINES.

